Muhammad Youssef Al-Najjar (Arabic: محمد يوسف النجار; 11 June 1930 – 10 April 1973), commonly known as Abu Youssef, was a Palestinian militant who was assassinated by Israel over alleged involvement in the 1972 Munich massacre.
[1] In 1965, while working in Kuwait, Abu Youssef founded Fatah along with Yasser Arafat and other exiled Palestinians.
Youssef was an early activist, traveling to Qatar to form similar groups, and taking command of Fatah's military wing.
[2] Youssef was allegedly involved in planning the 1972 Munich massacre, in which 11 Israeli athletes and coaches were killed by the Black September group.
Youssef and his wife were killed by gunfire when Israeli commandos stormed their Beirut apartment.